DG534A/538A
Vishay Siliconix
Document Number: 70069
S-05734—Rev. G, 29-Jan-02
www.vishay.com
1
4-/8-Channel Wideband Video Multiplexers
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C0068 Wide Bandwidth: 500 MHz
C0068 Very Low Crosstalk: –97 dB @ 5 MHz
C0068 On-Board TTL-Compatible Latches with
Readback
C0068 Optional Negative Supply
C0068 Low r
DS(on)
: 45 C0087
C0068 Single-Ended or Differential Operation
C0068 Latch-up Proof
C0068 Improved System Bandwidth
C0068 Improved Channel Off-Isolation
C0068 Simplified Logic Interfacing
C0068 High-Speed Readback
C0068 Allows Bipolar Signal Swings
C0068 Reduced Insertion Loss
C0068 Allows Differential Signal Switching
C0068 Wideband Signal Routing and
Multiplexing
C0068 Video Switchers
C0068 ATE Systems
C0068 Infrared Imaging
C0068 Ultrasound Imaging
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The DG534A is a digitally selectable 4-channel or dual
2-channel multiplexer. The DG538A is an 8-channel or dual
4-channel multiplexer. On-chip TTL-compatible address
decoding logic and latches with data readback are included to
simplify the interface to a microprocessor data bus. The low
on-resistance and low capacitance of the these devices make
them ideal for wideband data multiplexing and video and audio
signal routing in channel selectors and crosspoint arrays. An
optional negative supply pin allows the handling of bipolar
signals without dc biasing.
The DG534A/DG538A are built on a D/CMOS process that
combines n-channel DMOS switching FETs with low-power
CMOS control logic, drivers and latches. The low-capacitance
DMOS FETs are connected in a “T” configuration to achieve
extremely high levels of off isolation. Crosstalk is reduced to
–97 dB at 5 MHz by including a ground line between adjacent
signal paths. An epitaxial layer prevents latch-up.
For more information refer to Vishay Siliconix applications
note AN502.
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1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
GND NC
D
A
D
B
V+ V–
S
A1
S
B1
GND GND
S
A2
S
B2
4/2 V
L
RS I/O
Dual-In-Line
Top View
912WR EN
10 11A1 A0
Latches/Drivers
PLCC
14
15
16
17
18
8
7
6
5
4
1231920
111091312
Top View
S
A1
S
B1
GND GND
S
A2
S
B2
4/2 V
L
RS NC
1 0
EN I/O
V+ D GND D V–
Latch/Drivers
A A
A
B
WR
DG534ADN
DG534ADJ